ftp_nb_get
(PHP 4 >= 4.3.0)
ftp_nb_get -- Retrieves a file from the FTP server and writes it to a local file (non-blocking)
Description
bool
ftp_nb_get ( resource ftp_stream, string local_file, string remote_file, int mode [, int resumepos])
ftp_nb_get() retrieves remote_file
from the FTP server, and saves it to local_file
locally. The transfer mode specified must
be either FTP_ASCII or
FTP_BINARY. The difference between this function and the
ftp_get() is that this function retrieves the file
asynchronously, so your program can perform other operations while the
file is being downloaded.
Возвращает TRUE в случае успешного завершения, FALSE в случае возникновения ошибки.
Пример 1. ftp_nb_get() example // Initate the download
$ret = ftp_nb_get($my_connection, "test", "README", FTP_BINARY);
while ($ret == FTP_MOREDATA) {
// Do whatever you want
echo ".";
// Continue downloading...
$ret = ftp_nb_continue ($my_connection);
}
if ($ret != FTP_FINISHED) {
echo "There was an error downloading the file...";
exit(1);
} |
|
Пример 2. Resuming a download with ftp_nb_get() // Initate
$ret = ftp_nb_get ($my_connection, "test", "README", FTP_BINARY,
filesize("test"));
// OR: $ret = ftp_nb_get ($my_connection, "test", "README",
// FTP_BINARY, FTP_AUTORESUME);
while ($ret == FTP_MOREDATA) {
// Do whatever you want
echo ".";
// Continue downloading...
$ret = ftp_nb_continue ($my_connection);
}
if ($ret != FTP_FINISHED) {
echo "There was an error downloading the file...";
exit(1);
} |
|
Пример 3.
Resuming a download at position 100 to a new
file with ftp_nb_get()
// Disable Autoseek
ftp_set_option ($my_connection, FTP_AUTOSEEK, FALSE);
// Initiate
$ret = ftp_nb_get ($my_connection, "newfile", "README", FTP_BINARY, 100);
while ($ret == FTP_MOREDATA) {
...
// Continue downloading...
$ret = ftp_nb_continue ($my_connection);
} |
|
In the example above, "newfile" is 100
bytes smaller than "README" on the FTP
server because we started reading at offset 100. If we have
not have disabled FTP_AUTOSEEK, the first
100 bytes of newfile will be '\0'.
See also ftp_nb_fget(),
ftp_nb_continue(),
ftp_get() and ftp_fget().